I don't know but trust me, don't use any historical methods. Especially from when the Black Death hit Europe. No offence to those doctors, but they were all DOPES!
To protect ourselves, we have to protect ozone. Curb the use of CFC's.
we protect ourselves from running fast and running
Ozone layer depletion causes UV to enter. We must protect ourselves from its harmful actions.
There are scammers on the internet and we need to protect ourselves against them.
By wearing a condom.
To protect ourselves from infectious diseases
We can't. we can by killing u.
We protect ourselves from the ultraviolet radiation by staying indoors, covering exposed areas with clothing and using an appropriately rated sunscreen designed for that purpose.
To protect yourself, curb CFC's. They are the ones that destroy ozone.
Tape your mouth.
Hide in a safe place
with their teeth and claws